Fix skottie::PropertyHandle export

Bug: chromium:1266877
Change-Id: I6000d0dd8c9214aa37c1956834d6a14db151c929
Reviewed-on: https://skia-review.googlesource.com/c/skia/+/467956
Commit-Queue: Florin Malita <fmalita@google.com>
Reviewed-by: Florin Malita <fmalita@google.com>
1 file changed